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1%D \module
2%D   [       file=lang-ini,
3%D        version=1996.01.25,
4%D          title=\CONTEXT\ Language Macros,
5%D       subtitle=Initialization,
6%D         author=Hans Hagen,
7%D           date=\currentdate,
8%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
9%C
10%C This module is part of the \CONTEXT\ macro||package and is
11%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
12%C details.
13
14% \cldcontext{languages.numbers[tex.count.mainlanguagenumber]}
15
16%D This module implements multi||language support of \CONTEXT, which should not be
17%D confused with the multi||lingual interface. This support will be extended when
18%D needed. Properties of languages are defined in \TEX\ files as well as \LUA\
19%D files.
20
21\writestatus{loading}{ConTeXt Language Macros / Initialization}
22
23\registerctxluafile{lang-ini}{autosuffix}
24\registerctxluafile{lang-def}{}
25\registerctxluafile{lang-cnt}{}
26
27\unprotect
28
29\ifdefined\nonfrenchspacing\else \let\nonfrenchspacing\relax \fi
30\ifdefined\frenchspacing   \else \let\frenchspacing   \relax \fi
31
32%D When loading hyphenation patterns, \TEX\ assign a number to each loaded table,
33%D starting with~0. Switching to a specific table is done by assigning the relevant
34%D number to the predefined \COUNTER\ \type {\language}. However, in \MKIV\ a lot
35%D of management is delegated to \LUA.
36
37%D We keep track of the last loaded patterns by means of a pseudo \COUNTER. This
38%D just one of those situations in which we don't want to spent a real one. Language
39%D zero has no patterns, first of all because I like to start numbering at one. It
40%D may come in handy for special purposes as well.
41
42\normallanguage\zerocount
43
44%D \macros
45%D   {currentlanguage, setupcurrentlanguage}
46%D
47%D Instead of numbers,we are going to use symbolic names for the languages. The
48%D current langage is saved in the macro \type {\currentlanguage}. The setup macro
49%D is mainly used for cosmetic purposes.
50%D
51%D \starttyping
52%D \dorecurse{3}
53%D   {\language[nl]
54%D    \startmode[*en] english \stopmode
55%D    \startmode[*nl] dutch   \stopmode
56%D    \language[en]
57%D    \startmode[*en] english \stopmode
58%D    \startmode[*nl] dutch   \stopmode}
59%D \stoptyping
60
61\mutable\let\askedlanguage      \empty
62\mutable\let\currentlanguage    \empty
63\mutable\let\currentmainlanguage\empty
64
65%D \macros
66%D   {defaultlanguage,languageparameter,specificlanguageparameter}
67%D
68%D We don't use the commandhandler here (yet) because we have a rather special
69%D fallback mechanism so quite some compatibility testing is needed.
70
71\installcorenamespace{language}
72\installcorenamespace{languagelinked}
73
74\mutable\def\currentusedlanguage{\currentlanguage}
75
76\permanent\def\defaultlanguage#1%
77  {\ifcsname\??language#1\s!default\endcsname
78     \expandafter\defaultlanguage\lastnamedcs
79   \else
80     #1%
81   \fi}
82
83\permanent\def\languageparameter#1%
84  {\ifcsname\??language\currentlanguage#1\endcsname
85     \lastnamedcs
86   \orelse\ifcsname\??language\currentlanguage\s!default\endcsname
87     \expandafter\specificlanguageparameter\lastnamedcs{#1}%
88   \orelse\ifcsname\??language\s!default#1\endcsname
89     \lastnamedcs
90   \fi}
91
92\permanent\def\specificlanguageparameter#1#2%
93  {\ifcsname\??language#1#2\endcsname
94     \lastnamedcs
95   \orelse\ifcsname\??language#1\s!default\endcsname
96     \expandafter\specificlanguageparameter\lastnamedcs{#2}%
97   \orelse\ifcsname\??language\s!default#2\endcsname
98     \lastnamedcs
99   \fi}
100
101\permanent\def\mainlanguageparameter#1%
102  {\ifcsname\??language\currentmainlanguage#1\endcsname
103     \lastnamedcs
104   \orelse\ifcsname\??language\currentmainlanguage\s!default\endcsname
105     \expandafter\specificlanguageparameter\lastnamedcs{#1}%
106   \orelse\ifcsname\??language\s!default#1\endcsname
107     \lastnamedcs
108   \fi}
109
110\aliased\let\usedlanguageparameter\languageparameter
111
112\permanent\def\askedlanguageparameter#1% assumes \currentusedlanguage being set
113  {\ifcsname\??language\currentusedlanguage#1\endcsname
114     \lastnamedcs
115   \orelse\ifcsname\??language\currentusedlanguage\s!default\endcsname
116     \expandafter\specificlanguageparameter\lastnamedcs{#1}%
117   \orelse\ifcsname\??language\s!default#1\endcsname
118     \lastnamedcs
119   \fi}
120
121\permanent\protected\def\setusedlanguage#1%
122  {\edef\currentusedlanguage{\reallanguagetag{#1}}%
123   \ifempty\currentusedlanguage
124     \let\currentusedlanguage  \currentlanguage
125     \enforced\let\usedlanguageparameter\languageparameter
126   \orelse\ifx\currentusedlanguage\v!global
127     \let\currentusedlanguage  \currentmainlanguage
128     \enforced\let\usedlanguageparameter\mainlanguageparameter
129   \orelse\ifx\currentusedlanguage\v!local
130     \let\currentusedlanguage  \currentlanguage
131     \enforced\let\usedlanguageparameter\languageparameter
132   \else
133     \enforced\let\usedlanguageparameter\askedlanguageparameter
134   \fi}
135
136\permanent\protected\def\setupcurrentlanguage[#1]%
137  {\setcurrentlanguage\currentmainlanguage{#1}}
138
139\permanent\protected\def\setcurrentlanguage#1#2% sets modes: **id (currentmain) *id (current)
140  {\edef\p_askedlanguage{#1}% otherwise clash with \askedlanguage
141   \ifempty\p_askedlanguage \else
142     \ifempty\currentmainlanguage\else\resetsystemmode{\systemmodeprefix\currentmainlanguage}\fi
143     \let\currentmainlanguage\p_askedlanguage
144     \setsystemmode{\systemmodeprefix\currentmainlanguage}%
145   \fi
146   \edef\p_askedlanguage{#2}%
147   \ifempty\p_askedlanguage \else
148     \ifempty\currentlanguage\else\resetsystemmode\currentlanguage\fi
149     \let\currentlanguage\p_askedlanguage
150     \setsystemmode\currentlanguage
151   \fi}
152
153%D The internal macros will be defined later.
154
155%D \macros
156%D   {installlanguage}
157%D
158%D Hyphenation patterns can only be loaded when the format file is prepared. The
159%D next macro takes care of this loading. A language is specified with
160%D
161%D \showsetup{installlanguage}
162%D
163%D When \type {state} equals \type {start}, both patterns and additional hyphenation
164%D specifications are loaded. These files are seached for in the patterns path
165%D have names like \type {lang-nl.lua}.
166%D
167%D The \type {spacing} variable specifies how the spaces after punctuation has to be
168%D handled. English is by tradition more tolerant to inter||sentence spacing than
169%D other languages.
170%D
171%D This macro also defines \type {\identifier} as a shortcut switch to the language.
172%D Furthermore the command defined as being language specific, are executed. With
173%D \type {default} we can default to another language (patterns) at format
174%D generation time. Patterns are loaded at runtime.
175
176\newtoks \everysetuplanguage
177
178\aliased\let\installedlanguages\clf_installedlanguages % no need for \clf_
179
180\permanent\protected\def\doifelselanguage#1%
181  {\ifcsname\??language#1\c!state\endcsname
182     \expandafter\firstoftwoarguments
183   \else
184     \expandafter\secondoftwoarguments
185   \fi}
186
187\aliased\let\doiflanguageelse\doifelselanguage
188
189\permanent\def\reallanguagetag#1%
190  {\ifcsname\??languagelinked#1\endcsname\lastnamedcs\else#1\fi}
191
192% \language[#1] gave unwanted side effect of loading language specifics
193
194\mutable\let\currentsetuplanguage\empty
195
196\permanent\tolerant\protected\def\installlanguage[#1]#*[#2]%
197  {\ifcondition\validassignment{#2}%
198     \doifelselanguage{#1}
199       {\getparameters[\??language#1][#2]}
200       {\defcsname\??languagelinked#1\endcsname{#1}%
201        \getparameters[\??language#1][\c!state=\v!start,#2]%
202        \lang_basics_install_indeed{#1}{#1}}%
203     \edef\currentsetuplanguage{#1}%
204     \clf_definelanguage{#1}{\specificlanguageparameter{#1}\s!default}%
205     \the\everysetuplanguage
206   \else
207     \defcsname\??languagelinked#1\endcsname{#2}%
208     \clf_setlanguagesynonym{#1}{#2}%
209     \lang_basics_install_indeed{#1}{#2}%
210  \fi}
211
212\def\lang_basics_install_indeed#1#2%
213  {\ifcstok{\specificlanguageparameter{#1}\c!command}\v!no\orelse\ifcsname#1\endcsname\else
214     \frozen\instance\protected\defcsname#1\endcsname{\lang_basics_set_current[#2]}%
215   \fi}
216
217%D When the second argument is a language identifier, a synonym is created. This
218%D feature is present because we used dutch mnemonics in the dutch version, but
219%D nowadays conform a standard.
220
221\permanent\protected\def\doifelsepatterns#1%
222  {\begingroup % will change
223   \lang_basics_set_current[#1]%
224   \ifnum\normallanguage>\zerocount
225     \endgroup\expandafter\firstoftwoarguments
226   \else
227     \endgroup\expandafter\secondoftwoarguments
228   \fi}
229
230\aliased\let\doifpatternselse\doifelsepatterns
231
232%D \macros
233%D   {setuplanguage}
234%D
235%D Quick and dirty, but useful:
236%D
237%D \showsetup{setuplanguage}
238%D
239%D Beware, this command can only be used when a language is installed.
240
241\ifdefined\lang_basics_synchronize \else
242    \let\lang_basics_synchronize\relax % be nice for setups till we have one
243\fi
244
245\installmacrostack\currentlanguage
246
247\permanent\tolerant\protected\def\setuplanguage[#1]#*[#2]%
248  {\ifarguments
249     % only synchronize
250   \or
251     \let\currentsetuplanguage\currentlanguage
252     \getparameters[\??language\currentsetuplanguage][#1]%
253     \the\everysetuplanguage
254   \or
255     \push_macro_currentlanguage % can be default
256     \edef\currentsetuplanguage{\reallanguagetag{#1}}%
257     \getparameters[\??language\currentsetuplanguage][#2]%
258     \the\everysetuplanguage
259     \pop_macro_currentlanguage
260    %\doif\currentsetuplanguage\currentlanguage we can have influenced inheritance (default)
261   \fi
262   \lang_basics_synchronize}
263
264\appendtoks
265    \clf_unloadlanguage{\currentsetuplanguage}%
266\to \everysetuplanguage
267
268\setuplanguage
269  [\s!default]
270  [\s!patterns=,
271   \s!goodies=,
272   \s!lefthyphenmin=2,
273   \s!righthyphenmin=2,
274   \s!lefthyphenchar=-1,
275   \s!righthyphenchar=45,
276   % used in compound i.e. interfaced with c! and can be anything so no numbers
277   \c!lefthyphen=,
278   \c!righthyphen=-,
279   \c!hyphen=-,
280   \c!spacing=\v!packed,
281   \c!compoundhyphen=\compoundhyphen,
282   \c!rightcompoundhyphen=\compoundhyphen,
283   \c!leftcompoundhyphen=,
284   \c!midsentence=---,
285   \c!leftsentence=---,
286   \c!rightsentence=---,
287   \c!leftsubsentence=---,
288   \c!rightsubsentence=---,
289   \c!leftquote=\upperleftsinglesixquote,
290   \c!rightquote=\upperrightsingleninequote,
291   \c!leftquotation=\upperleftdoublesixquote,
292   \c!rightquotation=\upperrightdoubleninequote,
293   \c!leftspeech=\languageparameter\c!leftquotation,
294   \c!middlespeech=,
295   \c!rightspeech=\languageparameter\c!rightquotation,
296   \c!limittext=\unknown,
297   \c!time={h,:,m},
   \c!date={\v!year,\ ,\v!month,\ ,\v!day},
299   \c!text=Ag,
300   \c!font=] % \v!auto : experimental !
301
302% to be tested:
303%
304% \setuplanguage
305%   [\s!default]
306%   [\c!righthyphenchar="AD]
307
308%D The values \type {leftsentence} and \type {rightsentence} can be (and are) used
309%D to implement automatic subsentence boundary glyphs, like in {\fr |<|french
310%D guillemots|>|} or {\de |<|german guillemots|>|} or {\nl |<|dutch dashes|>|} like
311%D situations. Furthermore \type {leftquotation} and \type {leftquote} come into
312%D view \quotation {when we quote} or \quote {quote} something.
313
314%D \macros
315%D  {currentdatespecification, currenttimespecification}
316%D
317%D Just to make things easy we can ask for the current date specification by saying:
318
319\permanent\def\currentdatespecification{\languageparameter\c!date}
320\permanent\def\currenttimespecification{\languageparameter\c!time}
321
322%D Carefull reading of these macros shows that it's legal to say
323%D
324%D \starttyping
325%D \installlanguage [du] [de]
326%D \stoptyping
327
328%D \macros
329%D   {language,mainlanguage}
330%D
331%D Switching to another language (actually another hyphenation pattern) is done
332%D with:
333%D
334%D \starttyping
335%D \language[identifier]
336%D \stoptyping
337%D
338%D or with \type {\identifier}. Just to be compatible with \PLAIN\ \TEX, we still
339%D support the original meaning, so
340%D
341%D \starttyping
342%D \language=1
343%D \stoptyping
344%D
345%D is a valid operation, where the relation between number and language depends on
346%D the order in installing languages.
347%D
348%D \showsetup{language}
349%D \showsetup{mainlanguage}
350%D
351%D Both commands take a predefined language identifier as argument. We can use \type
352%D {\mainlanguage[identifier]} for setting the (indeed) main language. This is the
353%D language used for translating labels like {\em figure} and {\em table}. The main
354%D language defaults to the current language.
355
356\newtoks \everylanguage
357
358\installcorenamespace{languagenumbers}
359
360\appendtoks
361    % we need to reassign the number because new patterns can be defined later on
362    % so let's hope not that many \setups happen during a run
363    \gletcsname\??languagenumbers\currentlanguage\endcsname\undefined
364\to \everysetuplanguage
365
366\def\lang_basics_synchronize_yes
367  {\zerocount % see below
368   \global\expandafter\chardef\csname\??languagenumbers\currentlanguage\endcsname
369      \clf_languagenumber
370        {\currentlanguage}%
371        {\defaultlanguage\currentlanguage}%
372        {\languageparameter\s!patterns}%
373        {\languageparameter\s!goodies}%
374        {\languageparameter\c!factor}%
375      \relax
376   \normallanguage\csname\??languagenumbers\currentlanguage\endcsname}
377
378\let\lang_basics_synchronize_nop\zerocount % not loaded anyway
379
380\letvalue{\??languagenumbers}\lang_basics_synchronize_nop % initime
381
382\appendtoks
383    \letvalue{\??languagenumbers}\lang_basics_synchronize_yes % runtime
384\to \everydump
385
386\def\lang_basics_synchronize
387  {\normallanguage\csname\??languagenumbers
388     \ifcsname\??languagenumbers\currentlanguage\endcsname
389       \currentlanguage
390     \fi
391   \endcsname
392   \relax
393   \the\everylanguage
394   \relax}
395
396\newcount\hyphenstate
397\newcount\hyphenminoffset
398
399% This is the old implementation: a hack that sets the min values, because we want
400% to keep the language set:
401%
402% \protected\def\nohyphens % nicer for url's
403%   {\ifrelax\dohyphens
404%      \protected\edef\dohyphens
405%        {\hyphenminoffset\the\hyphenminoffset\relax
406%         \lang_basics_synchronize_min_max}%
407%    \fi
408%    \hyphenminoffset\plusthousand
409%    \lang_basics_synchronize_min_max}
410%
411% \let\dohyphens\relax
412
413% But this one is nicer because we do keep the language set as well as don't mess
414% with the min values (it's more efficient too). We might get some more bits in
415% this mode (engine specific).
416
417\exhyphenchar 45 % to permit breaking at explicit hyphens
418
419% \uchyph\plusone :
420
421% \chardef \completehyphenationcode \numexpr
422\permanent \integerdef \completehyphenationcode \numexpr
423    \normalhyphenationcode            % \discretionary
424  + \automatichyphenationcode         % -
425  + \explicithyphenationcode          % \-
426  + \syllablehyphenationcode          % pattern driven
427  + \uppercasehyphenationcode         % replaces \uchyph
428  + \compoundhyphenationcode          % replaces \compoundhyphenmode
429  % \strictstarthyphenationcode       % replaces \hyphenationbounds (strict = original tex)
430  % \strictendhyphenationcode         % replaces \hyphenationbounds (strict = original tex)
431  + \automaticpenaltyhyphenationcode  % replaces \hyphenpenaltymode (otherwise use \exhyphenpenalty)
432  + \explicitpenaltyhyphenationcode   % replaces \hyphenpenaltymode (otherwise use \exhyphenpenalty)
433  + \permitgluehyphenationcode        % turn glue into kern in \discretionary
434  + \permitallhyphenationcode         % okay, let's be even more tolerant
435  + \permitmathreplacehyphenationcode % and again we're more permissive
436  + \forcehandlerhyphenationcode      % kick in the handler (could be an option)
437  + \feedbackcompoundhyphenationcode  % feedback compound snippets
438  + \ignoreboundshyphenationcode      % just in case we have hyphens at the edges
439  + \collapsehyphenationcode          % collapse -- and ---
440\relax
441
442\permanent \integerdef \partialhyphenationcode \numexpr
443    \ignoreboundshyphenationcode      % just in case we have hyphens at the edges
444% + \explicithyphenationcode          % \-
445  + \collapsehyphenationcode          % collapse -- and ---
446\relax
447
448\hccode"002D "002D
449
450\permanent\protected\def\keephyphensequences
451  {\hccode"2010 \zerocount
452   \hccode"2013 \zerocount
453   \hccode"2014 \zerocount}
454
455\permanent\protected\def\collapsehyphensequences
456  {\hccode"2010 "2010\relax
457   \hccode"2013 "2013\relax
458   \hccode"2014 "2014\relax}
459
460\collapsehyphensequences
461
462% maybe a (un)setter for handlers
463
464\permanent\protected\def\dohyphens {\hyphenationmode\completehyphenationcode}
465\permanent\protected\def\nohyphens {\hyphenationmode\partialhyphenationcode}
466
467% \permanent\protected\def\dohyphens
468%   {\ifbitwiseand\hyphenationmode\collapsehyphenationcode
469%      \hyphenationmode\completehyphenationcode
470%    \else
471%      \hyphenationmode\numexpr\completehyphenationcode-\collapsehyphenationcode\relax
472%    \fi}
473
474% \permanent\protected\def\nohyphens
475%   {\ifbitwiseand\hyphenationmode\collapsehyphenationcode
476%      \hyphenationmode\partialhyphenationcode
477%    \else
478%      \hyphenationmode\numexpr\partialhyphenationcode-\collapsehyphenationcode\relax
479%    \fi}
480
481\permanent\protected\def\dohyphencollapsing{\hyphenationmode\bitwiseflip\hyphenationmode \collapsehyphenationcode}
482\permanent\protected\def\nohyphencollapsing{\hyphenationmode\bitwiseflip\hyphenationmode-\collapsehyphenationcode}
483
484\permanent\protected\def\doexplicithyphens{\hyphenationmode\bitwiseflip\hyphenationmode \explicithyphenationcode}
485\permanent\protected\def\noexplicithyphens{\hyphenationmode\bitwiseflip\hyphenationmode-\explicithyphenationcode}
486
487\permanent\protected\def\usehyphensparameter#1%
488  {\edef\p_hyphens{#1\c!hyphens}%
489   \ifx\p_hyphens\v!no
490     \ifbitwiseand\hyphenationmode\collapsehyphenationcode
491       \nohyphens
492     \else
493       \nohyphens
494       \nohyphencollapsing
495     \fi
496   \fi}
497
498\dohyphens
499
500%D The rest stays the same as in mkiv:
501
502\permanent\protected\def\lesshyphens
503  {\advance\hyphenminoffset\plusone
504   \lang_basics_synchronize_min_max}
505
506\permanent\protected\def\morehyphens
507  {\ifcase\hyphenminoffset \else
508     \advance\hyphenminoffset\minusone
509   \fi
510   \lang_basics_synchronize_min_max}
511
512\protected\def\lang_basics_synchronize_min_max % maybe store this at the lua end
513  {% these values are stored along with glyph nodes
514   \lefthyphenmin \numexpr0\languageparameter\s!lefthyphenmin +\hyphenminoffset\relax
515   \righthyphenmin\numexpr0\languageparameter\s!righthyphenmin+\hyphenminoffset\relax
516   \hyphenationmin\numexpr0\languageparameter\s!hyphenmin\relax
517   % these values are stored with the language (global!)
518   \prehyphenchar \languageparameter\s!righthyphenchar\relax
519   \posthyphenchar\languageparameter\s!lefthyphenchar \relax}
520
521\appendtoks
522    \lang_basics_synchronize_min_max
523\to \everylanguage
524
525\permanent\protected\def\unhyphenated
526  {\groupedcommand{\lefthyphenmin\maxdimen}\donothing}
527
528% \appendtoks
529%     \setups[\languageparameter\c!setups]%
530% \to \everylanguage
531
532%D You can setup the default language to reset settings.
533
534\mutable\let\currentlanguagesetups\empty
535
536\appendtoks
537    \edef\currentlanguagesetups{\languageparameter\c!setups}%
538    \ifempty\currentlanguagesetups \else
539        \setups[\currentlanguagesetups]%
540    \fi
541\to \everylanguage
542
543% new
544
545\appendtoks
546    \usebidiparameter\languageparameter
547\to \everylanguage
548
549% this will move to core-spa !
550
551\appendtoks
552    \edef\p_spacing{\languageparameter\c!spacing}%
553    \ifx\p_spacing\v!broad
554      \nonfrenchspacing
555    \else
556      \frenchspacing
557    \fi
558\to \everylanguage
559
560% \mainlanguage[nl] \setuplanguage[nl][lefthyphen=,righthyphen=?]
561%
562% \dorecurse{100}{dit is toch wel een heel\normalhyphendiscretionary lang\normalhyphendiscretionary woord \recurselevel\ }
563% \dorecurse{100}{dit is toch wel een heellangwoord \recurselevel\ }
564
565% new experimental feature
566
567\permanent\protected\def\setuplanguages
568  {\setuplanguage[\s!default]}
569
570% \setuplanguages[\c!font=\v!auto]
571% \setuplanguage[\s!default][\c!font=\v!auto]
572% \setuplanguage[nl][\c!font=\v!auto]
573
574\appendtoks
575    \edef\p_language_font{\languageparameter\c!font}%
576    \ifempty\p_language_font
577    \orelse\ifx\p_language_font\v!auto
578      \doaddfeature\currentlanguage
579    \else
580      \doaddfeature\p_language_font
581    \fi
582\to \everylanguage
583
584%D Fast switcher
585
586\def\lang_basics_switch_asked
587  {\ifcsname\??languagelinked\askedlanguage\endcsname
588     \edef\askedlanguage{\lastnamedcs}%
589     \ifx\currentlanguage\askedlanguage \else
590       \setcurrentlanguage\currentmainlanguage\askedlanguage
591       \lang_basics_synchronize
592     \fi
593   \fi}
594
595\permanent\protected\def\uselanguageparameter#1%
596  {\edef\askedlanguage{#1\c!language}%
597   \ifempty\askedlanguage\else\lang_basics_switch_asked\fi}
598
599\permanent\protected\def\douselanguageparameter#1% fast setter
600  {\edef\askedlanguage{#1}%
601   \ifempty\askedlanguage\else\lang_basics_switch_asked\fi}
602
603\protected\def\lang_basics_set_current[#1]%
604  {\edef\askedlanguage{#1}%
605   \ifempty\askedlanguage\else\lang_basics_switch_asked\fi}
606
607\pushoverloadmode
608
609    \permanent\protected\def\language
610      {\doifelsenextoptionalcs\lang_basics_set_current\normallanguage}
611
612    \aliased\let\setlanguage\language % we make these synonyms
613
614    \aliased\let\patterns\gobbleoneargument
615
616\popoverloadmode
617
618\newcount\mainlanguagenumber
619
620%D Beware: you might need to use \type {\dontleavehmode} outside and|/|or \type {\par}
621%D inside the group!
622
623\permanent\protected\def\startlanguage
624  {\begingroup\language}
625
626\permanent\let\stoplanguage\endgroup
627
628\permanent\protected\def\mainlanguage[#1]%
629  {\edef\askedlanguage{#1}%
630   \ifempty\askedlanguage
631   \orelse\ifcsname\??languagelinked\askedlanguage\endcsname
632    %\edef\askedlanguage{\csname\??languagelinked\askedlanguage\endcsname}%
633     \edef\askedlanguage{\lastnamedcs}%
634     \ifx\currentlanguage\askedlanguage
635       \ifx\currentmainlanguage\askedlanguage \else
636         \setcurrentlanguage\askedlanguage\askedlanguage
637         \lang_basics_synchronize
638       \fi
639     \else
640       \setcurrentlanguage\askedlanguage\askedlanguage
641       \lang_basics_synchronize
642     \fi
643   \fi
644   \mainlanguagenumber\normallanguage}
645
646\appendtoks
647    \normallanguage\mainlanguagenumber
648\to \everybeforepagebody
649
650%D Used at all?
651
652\permanent\def\splitsequence#1#2%
653  {\doifelse{#1}\v!no{#2}{\doifelse{#1}\v!yes{\languageparameter\c!limittext}{#1}}}
654
655\permanent\def\splitsymbol#1%
656  {\splitsequence{#1}{\languageparameter\c!limittext}}
657
658%D Just like with subsentence boundary symbols, quotes placement depends on the
659%D current language, therefore we show the defaults here.
660%D
661%D \def\ShowLanguageValues [#1] [#2] #3 #4
662%D   {\blank
663%D    \startlinecorrection
664%D    \vbox\bgroup
665%D    \language[#1]
666%D    \midaligned{\bf#2 subsentence symbol and quotes}
667%D    \framed[width=\hsize,frame=off,topframe=on,bottomframe=on,offset=.5ex]
668%D      {\hfil\quotation{#3 #4}\hfil\quote{#2}\hfil
669%D       \startsubsentence\startsubsentence#3\stopsubsentence#4\stopsubsentence\hfil}
670%D    \egroup
671%D    \stoplinecorrection
672%D    \blank}
673%D
674%D \ShowLanguageValues [af] [afrikaans]  afrikaanse ...
675%D \ShowLanguageValues [ca] [catalan]    catalan ...
676%D \ShowLanguageValues [cs] [czech]      tjechisch tex
677%D \ShowLanguageValues [cs] [slovak]     slowaakse ...
678%D \ShowLanguageValues [da] [danish]     deense ...
679%D \ShowLanguageValues [de] [german]     duitse degelijkheid
680%D \ShowLanguageValues [en] [english]    engelse humor
681%D \ShowLanguageValues [et] [estonian]   ...
682%D \ShowLanguageValues [fi] [finnish]    finse ...
683%D \ShowLanguageValues [fr] [french]     franse slag
684%D \ShowLanguageValues [it] [italian]    italiaanse ...
685%D \ShowLanguageValues [la] [latin]      latijnse missen
686%D \ShowLanguageValues [nl] [dutch]      nederlandse zuinigheid
687%D \ShowLanguageValues [nb] [bokmal]     noorse zalm
688%D \ShowLanguageValues [nn] [nnynorsk]   noorse zalm
689%D \ShowLanguageValues [pl] [polish]     poolse vlag
690%D \ShowLanguageValues [pt] [portuguese] portugese ...
691%D \ShowLanguageValues [es] [spanish]    spaans benauwd
692%D \ShowLanguageValues [sv] [swedish]    zweedse ...
693%D \ShowLanguageValues [tr] [turkish]    turks fruit
694
695%D We support a lot of languages. These are specified and loaded in separate files,
696%D according to their roots. Here we only take care of (postponed) setting of the
697%D current language.
698%D
699%D \unprotect
700%D \placetable{The germanic languages (\type{lang-ger})}
701%D \starttable[||||]
702%D \HL
703%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
704%D \HL
705%D \NC \s!nl        \NC dutch        \NC germanic  \NC\FR
706%D \NC \s!en        \NC english      \NC germanic  \NC\MR
707%D \NC \s!de        \NC german       \NC germanic  \NC\MR
708%D \NC \s!da        \NC danish       \NC germanic  \NC\MR
709%D \NC \s!sv        \NC swedish      \NC germanic  \NC\MR
710%D \NC \s!af        \NC afrikaans    \NC germanic  \NC\MR
711%D \NC \s!nb        \NC bokmal       \NC germanic  \NC\LR
712%D \NC \s!nn        \NC nynorsk      \NC germanic  \NC\LR
713%D \HL
714%D \stoptable
715%D \protect
716%D
717%D \unprotect
718%D \placetable{The italic languages (\type{lang-ita})}
719%D \starttable[||||]
720%D \HL
721%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
722%D \HL
723%D \NC \s!fr        \NC french       \NC italic    \NC\FR
724%D \NC \s!ca        \NC catalan      \NC italic    \NC\MR
725%D \NC \s!es        \NC spanish      \NC italic    \NC\MR
726%D \NC \s!it        \NC italian      \NC italic    \NC\MR
727%D \NC \s!la        \NC latin        \NC italic    \NC\MR
728%D \NC \s!pt        \NC portuguese   \NC italic    \NC\LR
729%D \HL
730%D \stoptable
731%D \protect
732%D
733%D \unprotect
734%D \placetable{The slavic languages (\type{lang-sla})}
735%D \starttable[||||]
736%D \HL
737%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
738%D \HL
739%D \NC \s!pl        \NC polish       \NC slavic    \NC\FR
740%D \NC \s!cs        \NC czech        \NC slavic    \NC\MR
741%D \NC \s!sk        \NC slavik       \NC slavic    \NC\LR
742%D \HL
743%D \stoptable
744%D \protect
745%D \unprotect
746%D
747%D \placetable{The altaic languages (\type{lang-alt})}
748%D \starttable[||||]
749%D \HL
750%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
751%D \HL
752%D \NC \s!tr        \NC turkish      \NC altaic    \NC\SR
753%D \HL
754%D \stoptable
755%D
756%D \placetable{The uralic languages (\type{lang-ura})}
757%D \starttable[||||]
758%D \HL
759%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
760%D \HL
761%D \NC \s!fi        \NC finnish      \NC uralic    \NC\SR
762%D \HL
763%D \stoptable
764%D \protect
765
766\permanent\protected\def\nopatterns{\normallanguage\minusone}
767
768%D We default to the language belonging to the interface. This is one of the few
769%D places outside the interface modules where \type {\startinterface} is used.
770
771\setupcurrentlanguage[\s!en]
772
773\permanent\protected\def\initializemainlanguage
774  {\mainlanguage[\currentlanguage]%
775   \showmessage\m!languages9\currentlanguage}
776
777%D New:
778
779\permanent\let\stopexceptions\relax
780
781\tolerant\permanent\protected\def\startexceptions[#1]#:#2\stopexceptions
782  {\begingroup
783   \edef\askedlanguage{\reallanguagetag{#1}}%
784   \ifempty\askedlanguage
785     \let\askedlanguage\currentlanguage
786   \fi
787   \clf_setlanguageexceptions{\askedlanguage}{#2}%
788   \endgroup}
789
790\permanent\let\stoppatterns\relax
791
792\tolerant\permanent\protected\def\startpatterns[#1]#:#2\stoppatterns
793  {\begingroup
794   \edef\askedlanguage{\reallanguagetag{#1}}%
795   \ifempty\askedlanguage
796     \let\askedlanguage\currentlanguage
797   \fi
798   \clf_setlanguagepatterns{\askedlanguage}{#2}%
799   \endgroup}
800
801
802\pushoverloadmode
803
804\permanent\protected\def\hyphenation{\clf_setlanguageexceptions{\currentlanguage}}
805\permanent\protected\def\patterns   {\clf_setlanguagepatterns  {\currentlanguage}}
806
807\popoverloadmode
808
809%D New:
810
811\permanent\protected\def\traceddiscretionary#1#%
812  {\dontleavehmode\lang_basics_traced_discretionary{#1}}
813
814\protected\def\lang_basics_traced_discretionary#1#2#3#4%
815  {\normaldiscretionary#1{\darkred#2}{\darkgreen#3}{\darkblue#4}}
816
817\def\lang_basics_trace_discretionary_yes{\enforced\let\discretionary\traceddiscretionary} % indirect because of overload
818\def\lang_basics_trace_discretionary_nop{\enforced\let\discretionary\normaldiscretionary} % indirect because of overload
819
820
821\installtextracker
822  {discretionaries}
823  {\lang_basics_trace_discretionary_yes}
824  {\lang_basics_trace_discretionary_nop}
825
826\permanent\protected\def\samplediscretionary
827  {\traceddiscretionary
828     {pre\clf_currentprehyphenchar}%
829     {\clf_currentposthyphenchar post}%
830     {replace}}
831
832%D A typical \LMTX\ feature:
833%D
834%D \starttyping
835%D whatever\par
836%D {\nokerning whatever}\par
837%D efficient ff fi\par
838%D {\noligaturing efficient ff fi}\par
839%D {\nokerning\noligaturing efficient ff fi}\par
840%D {e{\noligaturing ffi}cient}\par
841%D {ef{\noleftligaturing f}icient ff fi}\par
842%D {ef{\norightligaturing f}icient ff fi}\par
843%D \stoptyping
844
845\immutable\chardef\nokerningcode   \numexpr\noleftkernglyphoptioncode    +\norightkernglyphoptioncode    \relax
846\immutable\chardef\noligaturingcode\numexpr\noleftligatureglyphoptioncode+\norightligatureglyphoptioncode\relax
847
848\permanent\protected\def\nokerning   {\bitwiseflip\glyphoptions\nokerningcode}
849\permanent\protected\def\noligaturing{\bitwiseflip\glyphoptions\noligaturingcode}
850
851\permanent\protected\def\noleftkerning    {\bitwiseflip\glyphoptions\noleftkernglyphoptioncode}
852\permanent\protected\def\noleftligaturing {\bitwiseflip\glyphoptions\noleftligatureglyphoptioncode}
853\permanent\protected\def\norightkerning   {\bitwiseflip\glyphoptions\norightkernglyphoptioncode}
854\permanent\protected\def\norightligaturing{\bitwiseflip\glyphoptions\norightligatureglyphoptioncode}
855
856% This is not really language related but let's define it here:
857
858\permanent\protected\def\noitaliccorrection{\bitwiseflip\glyphoptions\noitaliccorrectionglyphoptioncode}
859
860%D Also \LMTX:
861
862% \startlanguageoptions[de]
863%     Zapf|innovation
864% \stoplanguageoptions
865
866\permanent\let\stoplanguageoptions\relax
867
868\permanent\protected\def\startlanguageoptions
869  {\begingroup
870   \catcode`|\othercatcode
871   \lang_startlanguageoptions}
872
873\tolerant\def\lang_startlanguageoptions[#1]#:#2\stoplanguageoptions
874  {\edef\askedlanguage{\reallanguagetag{#1}}%
875   \ifempty\askedlanguage
876     \let\askedlanguage\currentlanguage
877   \fi
878   \clf_setlanguageoptions{\askedlanguage}{#2}%
879   \endgroup}
880
881\protect \endinput
882